147648684781 has 4 divisors (see below), whose sum is σ = 159006275932. Its totient is φ = 136291093632.

The previous prime is 147648684737. The next prime is 147648684791. The reversal of 147648684781 is 187486846741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187486846741 = 65089 ⋅2880469.

It can be written as a sum of positive squares in 2 ways, for example, as 33499980900 + 114148703881 = 183030^2 + 337859^2 .

It is a cyclic number.

It is not a de Polignac number, because 147648684781 - 2⁹ = 147648684269 is a prime.

It is a super-2 number, since 2×147648684781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147648684721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5678795556 + ... + 5678795581.

It is an arithmetic number, because the mean of its divisors is an integer number (39751568983).

Almost surely, 2^147648684781 is an apocalyptic number.

It is an amenable number.

147648684781 is a deficient number, since it is larger than the sum of its proper divisors (11357591151).

147648684781 is a wasteful number, since it uses less digits than its factorization.

147648684781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11357591150.

The product of its digits is 57802752, while the sum is 64.

The spelling of 147648684781 in words is "one hundred forty-seven billion, six hundred forty-eight million, six hundred eighty-four thousand, seven hundred eighty-one".